Create twenty app improvements (#20688)

create-twenty-app updates:
- remove --example option
- sync --once when scaffolding an applicaiton
- rename --api-url option to --workspace-url
- create a standalone page when scaffolding an app
<img width="1494" height="765" alt="image"
src="https://github.com/user-attachments/assets/0e35ed0c-b0aa-466c-9f56-7939294fd2cf"
/>

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packages/twenty-client-sdk/src/metadata/generated/schema.graphql

@@ -1395,6 +1395,7 @@ type PageLayout {
   objectMetadataId: UUID
   tabs: [PageLayoutTab!]
   defaultTabToFocusOnMobileAndSidePanelId: UUID
+  universalIdentifier: UUID!
   createdAt: DateTime!
   updatedAt: DateTime!
   deletedAt: DateTime

packages/twenty-client-sdk/src/metadata/generated/schema.ts

@@ -1056,6 +1056,7 @@ export interface PageLayout {
     objectMetadataId?: Scalars['UUID']
     tabs?: PageLayoutTab[]
     defaultTabToFocusOnMobileAndSidePanelId?: Scalars['UUID']
+    universalIdentifier: Scalars['UUID']
     createdAt: Scalars['DateTime']
     updatedAt: Scalars['DateTime']
     deletedAt?: Scalars['DateTime']
@@ -3983,6 +3984,7 @@ export interface PageLayoutGenqlSelection{
     objectMetadataId?: boolean | number
     tabs?: PageLayoutTabGenqlSelection
     defaultTabToFocusOnMobileAndSidePanelId?: boolean | number
+    universalIdentifier?: boolean | number
     createdAt?: boolean | number
     updatedAt?: boolean | number
     deletedAt?: boolean | number

packages/twenty-client-sdk/src/metadata/generated/types.ts

@@ -2780,6 +2780,9 @@ export default {
             "defaultTabToFocusOnMobileAndSidePanelId": [
                 3
             ],
+            "universalIdentifier": [
+                3
+            ],
             "createdAt": [
                 4
             ],